Compare AdGuard AdBlocker and Diigo: Which Extension is the Best?
AdGuard Adblocker is a browser extension with over 14 million users, designed to block ads, enhance privacy, and protect against online threats. Read our detailed review to see how it performs. | Diigo is a handy tool for bookmarking, highlighting, and annotating web pages. It has many features, but its old design and limited highlight colors might make it less appealing. | |
| Key Features A summary of the most important features offered by each extension. |
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| Our Rating Tooltivity's expert review score for each extension, based on hands-on testing and research. | 9.0 Winner in this category | 7.8 |
| Total users Total active users across all major browsers: Chrome, Edge, Firefox, and Safari. | 26,844,851 Winner in this category | 200,000 |
| Total ratings Total number of user ratings received across all supported browsers. | 78,338 Winner in this category | 2,319 |
| Average rating Average user rating across all browsers, calculated from available store ratings. | 4.3 ⭐ | 4.6 ⭐ Winner in this category |
| Entry Level Price The minimum price required to start using the extension. "Free" means a free tier is available. | Free | Free |
| Chrome User rating and stats for the extension on Chrome browser. |  4.7 4.19 Average Chrome Web Store rating from the last 100 reviews 14.0M+Users Winner in this category | 4.6 3.56 Average Chrome Web Store rating from the last 100 reviews 200.0K+Users |
| Edge User rating and stats for the extension on Edge browser. |  4.8 4.23 Average Microsoft Edge Store rating from the last 100 reviews 11.4M+Users Winner in this category | - |
| Firefox User rating and stats for the extension on Firefox browser. |  4.7 4.44 Average Mozilla Firefox Add-ons Store rating from the last 100 reviews 1.5M+Users Winner in this category | - |
| Safari User rating and stats for the extension on Safari browser. | - | - |
| Features Tooltivity's expert score for the 'Features' aspect of each extension. | 9.3 Ad Blocker:In our tests, ad banners and ad videos were blocked on all websites, including YouTube and Twitch. Blocked ads also include social media widgets and pop-ups, among other things.  Privacy and Malware Protection:The extension blocks tracking by blocking third-party trackers on all websites and protects your personal data. It also detects and blocks malicious websites and spyware.  CustomizableAdGuard Adblocker offers the option of activating or deactivating all functions yourself. Winner in this category | 8.5 Diigo offers basic features for a highlighter and bookmarking tool. It works well and we were able to highlight most websites and they were recreated when revisiting them. The highlighter popup makes it easy to highlight text offering 4 colors. It looks like this:  We would have wished to have more color options. Also, note-taking and the tagging functionality are working, but its design does not look appealing.  The dashboard where your highlights are stored works well and gives you an overview of all your highlights.  |
| Performance Tooltivity's expert score for the 'Performance' aspect of each extension. | 9.0 A recent user complained in a review that it had YouTube problems that affected the performance and speed of the website. In our test, we did not notice any performance problems. The extension generally works quickly and reliably. There are also regular updates, so the problem may already have been solved. Winner in this category | 8.0 Diigo performs well in terms of highlighting and syncing across devices. The fact that highlights are always synchronized can cause some loading delays. It's not as fast as other highlighters that use an offline-first approach, but it works reasonably well. However, the unreliable link creation feature and the simple sidebar outliner design need improvement. |
| Design Tooltivity's expert score for the 'Design' aspect of each extension. | 9.2 The design is very clear and well-organized. The display of the settings is significant for adblockers. Here, great importance has been attached to user-friendliness and highlighting the customizable settings. Winner in this category | 7.0 The design fulfills its functionality. The design of Diigo is outdated and could use a modern refresh. The lack of a nice overview of all your highlights on the page itself means you have to open the dashboard on diigo.com instead. The dashboard on diigo.com is okay, but other highlighters like Web Highlights have a much nicer user interface. |
| Value for Money Tooltivity's expert score for the 'Value for Money' aspect of each extension. | 9.2 The free browser extension offers numerous functions that worked perfectly in the test. Compared to competitors, you get many functions here that others offer for a fee. Winner in this category | 8.0 The free version of Diigo offers basic features and is fine for most users. The paid plans are reasonably priced and similar to other highlighters. However, we think other highlighters offer more value for the same price. |
| Ease of Use Tooltivity's expert score for the 'Ease of Use' aspect of each extension. | 9.5 Installation is quick and easy. What impressed us in comparison to other competitors was that AdGuard Adblocker clearly shows which functions it offers and explains them in the introduction, and you can activate them directly if you wish. The extension therefore attaches great importance to ensuring that every user recognizes and uses the options. With competitors, some functions were somewhat hidden in the settings.  Winner in this category | 7.8 Diigo is fairly easy to use, but the sidebar outliner takes some time to get used to. You can't see all your highlights on the page itself, so you have to go to the dashboard on diigo.com. We wish there was a sidebar to quickly access all our highlighted pages, like in the Web Highlights extension. |
| Security & Privacy Tooltivity's expert score for the 'Security & Privacy' aspect of each extension. | 8.0 Strong privacy protection by preventing tracking. Also features malware detection and blocking, although public complaints could raise concerns. Winner in this category | 7.5 Diigo takes reasonable steps to protect user data. However, since you need an account and your data is stored in their database, absolute protection can't be guaranteed. We think a highlighter should work without needing to sign up, but this feature is missing in Diigo. |
| Conclusion A summary of our findings and final thoughts for each extension. | AdGuard Adblocker is, in our opinion, a very good ad-blocking tool compared to its competitors, offering a range of features in the free extension that you often have to pay for. In our test, all ads were blocked. Other ad blockers currently fail because of YouTube's advertising videos, but AdGuard currently seems to have this fully under control. Overall, it is the choice for a free browser extension with many features. Finally, we would like to point out that our test is about the browser extension. If you work in different browsers and don't want to install a new extension in each one, or if you work a lot in apps that carry out advertising and tracking, AdGuard Adblocker offers an app for comprehensive security outside the browser. The AdGuard app allows you to block advertising in other apps outside of your web browser, for example, and keep your data secure. Here is an overview of the additional functions:  Currently, you have the opportunity to purchase the app as a lifetime plan. Here you can decide whether the app should be installed on 3 or 9 devices.  | Diigo is a handy tool for collecting stuff from the web, like bookmarks, highlights, and notes.
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| Our Recommendation | In our comparison between AdGuard AdBlocker and Diigo, AdGuard AdBlocker came out on top, scoring 9. AdGuard AdBlocker is the most widely used, with over 27 million users and 78k+ reviews—and it also delivered the strongest performance in our tests. User reviews for AdGuard AdBlocker reflect our findings, while we rate Diigo lower than users do. Notably, Diigo has the highest user rating in the Chrome Web Store at 4.60, which is even higher than our rating of 7.8. There are some noticeable differences between these extensions, so it's worth considering your priorities and the details below.
If you want a quick recommendation, AdGuard AdBlocker is our top pick. But as always, the best choice depends on what matters most to you. | |
